vcl: remove boost/signal2/signal.hpp from header

The most relevant signal member function appears to be connect(),
so let's create a wrapper function for that now, without the more
esoteric ordering features for now.

Move the signal member itself to a new pImpl.

The benefits are worth it: preprocessor input reduced by 2.8GB,
that's 9% of the total (excluding system headers which are not counted
because they don't generate dependencies).

Change-Id: I0aaeda51a5630a348bb12c81a83f67afbd508a14

2 files changed, 15 insertions, 3 deletions

diff --git a/include/svtools/DocumentInfoPreview.hxx b/include/svtools/DocumentInfoPreview.hxx
index 9eba310af05c..6cd4fc8b7365 100644
--- a/include/svtools/DocumentInfoPreview.hxx
+++ b/include/svtools/DocumentInfoPreview.hxx
@@ -29,6 +29,8 @@
 #include <tools/wintypes.hxx>
 #include <vcl/window.hxx>
 
+#include <boost/scoped_ptr.hpp>
+
 class SvtDocInfoTable_Impl;
 
 namespace com { namespace sun { namespace star {
diff --git a/include/vcl/edit.hxx b/include/vcl/edit.hxx
index c134780ee035..a24598516aef 100644
--- a/include/vcl/edit.hxx
+++ b/include/vcl/edit.hxx
@@ -20,17 +20,23 @@
 #ifndef INCLUDED_VCL_EDIT_HXX
 #define INCLUDED_VCL_EDIT_HXX
 
-#include <boost/signals2/signal.hpp>
+#include <vcl/ctrl.hxx>
+
+#include <functional>
+#include <memory>
+
 #include <tools/solar.h>
 #include <vcl/dllapi.h>
 #include <vcl/timer.hxx>
 #include <vcl/idle.hxx>
-#include <vcl/ctrl.hxx>
 #include <vcl/menu.hxx>
 #include <vcl/dndhelp.hxx>
 #include <vcl/vclptr.hxx>
 #include <com/sun/star/uno/Reference.h>
 
+// forward declare signals stuff - those headers are staggeringly expensive
+namespace boost { namespace signals2 { class connection; } }
+
 namespace com {
 namespace sun {
 namespace star {
@@ -68,6 +74,9 @@ enum AutocompleteAction{ AUTOCOMPLETE_KEYINPUT, AUTOCOMPLETE_TABFORWARD, AUTOCOM
 class VCL_DLLPUBLIC Edit : public Control, public vcl::unohelper::DragAndDropClient
 {
 private:
+    struct Impl;
+    ::std::unique_ptr<Impl> m_pImpl;
+
     VclPtr<Edit>        mpSubEdit;
     Timer*              mpUpdateDataTimer;
     TextFilter*         mpFilterText;
@@ -244,7 +253,8 @@ public:
     void                SetSubEdit( Edit* pEdit );
     Edit*               GetSubEdit() const { return mpSubEdit; }
 
-    boost::signals2::signal< void ( Edit* ) > autocompleteSignal;
+    void SignalConnectAutocomplete(::boost::signals2::connection * pConnection,
+            ::std::function<void (Edit *)>);
     AutocompleteAction  GetAutocompleteAction() const { return meAutocompleteAction; }
 
     virtual Size        CalcMinimumSize() const;